<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>01-Hello world</title>
	<script src="vue.js"></script>
</head>
<body>
	<div id='app'>{{content}}</div>
	<script>
		var app=new Vue({
			el:'#app',
			data:{
				content:'hello world'
			}
		})

		setTimeout(function(){
			app.$data.content='bye '
		},2000)
	</script>
</body>
</html>